n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 70 |
6 | 464 |
7 | 3482 |
8 | 27779 |
9 | 233556 |
10 | 2038484 |
11 | 18357672 |
12 | 169599492 |
13 | 1601270562 |
14 | 15401735750 |
15 | 150547249932 |
16 | 1492451793728 |
17 | 14980801247673 |
18 | 152047178479946 |
19 | 1558569469867824 |
20 | 16119428039548246 |
[1,1,1,3,12,70,464,3482,27779,233556,2038484, 18357672,169599492,1601270562,15401735750, 150547249932,1492451793728,14980801247673, 152047178479946,1558569469867824, 16119428039548246] |